Return-path: Received: from nz-out-0506.google.com ([64.233.162.232]:64514 "EHLO nz-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754654AbXI1VUX (ORCPT ); Fri, 28 Sep 2007 17:20:23 -0400 Received: by nz-out-0506.google.com with SMTP id s18so2103747nze for ; Fri, 28 Sep 2007 14:20:22 -0700 (PDT) Message-ID: <1ba2fa240709281420n6b32efa9ha8ffb1af6edc4264@mail.gmail.com> Date: Fri, 28 Sep 2007 23:20:21 +0200 From: "Tomas Winkler" To: "Johannes Berg" Subject: Re: iwlwifi scan question Cc: linux-wireless In-Reply-To: <1190980214.13581.2.camel@johannes.berg> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 References: <1190815228.4204.9.camel@johannes.berg> <1ba2fa240709280441s3eceac51x74a8bb8e422808f2@mail.gmail.com> <1190980214.13581.2.camel@johannes.berg> Sender: linux-wireless-owner@vger.kernel.org List-ID: On 9/28/07, Johannes Berg wrote: > On Fri, 2007-09-28 at 13:41 +0200, Tomas Winkler wrote: > > On 9/26/07, Johannes Berg wrote: > > > When iwlwifi scans in firmware, which MAC address does it use? What if > > > you've added multiple virtual interfaces as you said you could support? > > > > > Scanning is STA feature so only one MAC address is used in that case. > > namely iwl_rxon_cmd.node_addr > > Whichever address that will be, ok :) > > Though, actually, scanning is not just a STA feature is it? APs will > sometimes want to do a quick background scan too, I think. > We do monitor beacons on the same channels or channels for 11n coexistence issues but I don't think protocol wise in AP mode it is possible to stop listening on the channel. But I'm not the expert on this issues WDS etc. There are some other cases when you mix STA and AP mode but that's another story. > > Do you know any use case to support STA with multiple MAC addresses? > > Not really, unless you can implement a TSF adoption per local MAC > address. I guess you could turn off powersave and do the backoff > algorithm a bit out of spec and get by with just one timer too. > > johannes > >